The Windows 7 burger favors the early birds. Each day, the first 30 customers get the Whopper for 777 Yen (about $8.50). Stragglers must pay closer to $17. But if you feast upon one for breakfast, you'd best avoid food for the rest of the day. The Whopper packs in about 2,100 calories – more than you should eat in an entire day, according to the FDA.